Wireless signaling system.



I PATENTED JAN. 6, 1903.. H. SHOEMAKER Gz G. w. 210mm).

WIRELESS SIGNALING SYSTEM.

APPLIUATION FILED JUNE 22. 1901..

BIO MODEL;

WI TNESSES 1! TTURNEK UNITED STATES PATENT OFFrcE.

HARRY SHOEMAKER, OF PHILADELPHIA, PENNSYLVANIA, AND GREENLEAF W. PIOKARD, OF BOSTON, MASSACHUSETTS, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO GUSTAVE P. GEHRING, OF PHILADELPHIA, PENNSYLVANIA, AND THE CONSOLlDATED WIRELESS TELEGRAPH AND TELEPHONE COMPANY, A CORPORATION OF ARIZONA TERRITORY.

WIRELESS SIG NALING SYSTEM.

SPECIFICATION forming part of, Letters Patent No.

Ap lication filed June 22, 1901.

To all whom it may concern:

Be it known that we, HARRY SHOEMAKER, residing at Philadelphia, in thercounty of Philadelphia and State of Pennsylvania, and

GREENLEAF W. PICKARD, residing at Boston, in the county of Sufiolk, State of Mas-' sachusetts, citizens of the United States, have invented certain new and useful Improvements in Wireless Signaling Systems, of

to which the following is a specification.

Our invention relates to electrical signal ing, more especially those systems in which electroradiant energy is transmitted through the natural media.

More especially our invention relates to the receiving apparatus employed in such system.

Our invention comprises a chemical recording device controlled by'the received electroradiant energy, the object being to dispense with the usual electromagnetic apparatus, which we find often causes false signals and other undesirable efiects in virtue of the selfinduction of such apparatus. The extra current or othereffect at the rupture ofthe cir- 2 5 cuit of such electromagnetic apparatus becomes a source of electroradiations or other effects which influence the wave-responsive device of the receiver in such manner as to cause the record of a false signal. By the employmentof a chemical recorderthese serious defects are obviated and only such signals recorded as are actually transmitted from the transmitting-station- Our invention consists, further, of a plu- 3 5 rality of wave-responsive devices with their independent restoring devices so arranged and .controlled that at all times there shall be at least one wave-responsive device in acondition to receive or manifest the reception of electroradiant energy.

Our invention consists, further, of automatic means for starting a recording apparatus upon the reception of the first impulse of electroradiant energy.

Reference is to be had to the accompanying drawings, in Which- Figure 1 is a diagrammatic view of the re- 717,765, dated January 6, 1903.

Serial No. 65,616- (No mndeLl ceiving apparatus. Fig. is an elevational view of the decohering or restoring devices. A represents the usual aerial conductor of a wireless signaling system, between which and the earth-plate E are connected two waveresponsive devices 2'and 3, arranged in parallel with each other. These wave-responsive devices are of the coherer type. In alocal circuit controlled by these wave-responsive devices areincluded a source of energy 5, the winding 8 of a relay, a contact 7, and a member or armature 6, engaging therewith during the period when no signals are being recorded. The tongue 9 of said relay 8 and the contact-point 10 control a local circuit including the electromagnet 11, which controls the armature 6, and the source of energy 12.

Upon the reception of the first impulse of electroradiant energy one or the other of wave-responsive devices 2 and 3, or both, changes its resistance, thereby causing the actuation of relay 8 to close the circuit between tongue 9 and contact-point 10. The engagement of the tongue and contact results in the energization of electromagnet 11,which then attracts its armature 6, rupturing circuit between 6 and 7,which is, in effect, opening the circuit of the relay 8. As seen in Fig. 2, the armature 6 has a projection 39, which extends into the path of travel of the member 13, carried by the shaft 14. This shaft 14 constitutes an element in a train of gears carried in part upon shaft 15 and all driven by the spring-motor or other motor 16. Upon the attraction of armature 6 it falls backwardly until the button 38 engages the wall of the receptacle M and remains there until replaced by the hand of the operator. When in this attracted position, the detent or member 13 is permitted to rotate, and, in fact, permits the whole spring-driven mechanism to operate. Upon the shaft 15 is carried a roller 31, between which and the spring-pressed roller 31 passes the tape 30, which is chemically treated and is drawn by rollers 30 31' between the platen 28 and the stylus 29. 28 and 29 are in a second local circuitincluding the source of energy 5 and the wave-responsive devices 2 and 3. The shaft 15 carries also a pulley 17 and drives by means of belt 18 a pulley 19 on the shaft 20. Upon this shaft 20 is mounted acam 35, which has a notch or shoulder 36. At 21 is a shaft bearing in the lugs or ears 25 and 26, and upon this shaft are pivoted independently of each other the tapping members 23 and 24, which are controlled by spiral springs 27, embracing the shaft 21. At the outer ends of these arms 23 and 24 are the small hammers 32 32, arranged directly below the wave-responsive devices 2 and 3. The members 23 and 24 have downwardly-extending arms 33 33, which are provided at their lower ends with inwardly-extending points 34 34. The disposition of the spiral springs 27 is such that these points 34 34 are constantly in engagement with the periphery of the cam 35, which rotates in a clockwise direction as viewed in Fig. 2. As the point 36 of the cam passes either of these points 34 such point 34 suddenly moves inwardly, and in consequence one or the other of hammers 32 delivers a blow to its associated Wave-responsive device. As the cam rotates the wave-responsive devices are alternately tapped, so that there may be at all times a wave-responsive device in condition to respond to received energy.

The operation of the device is as follows: Upon the reception of the first impulse of electroradiant energy relay 8 is energized and in turn electromagnet 11, which latter then permits the spring-motor to start and opens the circuit of relay 8. As the springmotor starts the sensitized tape 30 begins to move between the platen 28 and stylus 29 and simultaneously wave-responsive devices 2 and 3 are alternately tapped. Allsucceeding impulses of electroradiant energy then affect the wave-responsive devices 2 and 3 in the usual manner and current flows from the source 5 through platen 28- and tape 30 to stylus 29, resulting in marks upon the tape 30, as well understood in ordinary telegraphy. The dots and dashes represented by the transmitted electroradiant energy are then reproduced on the tape 30, and all relays or other electromagnetic apparatus are dispensed with, thus obviating the aforementioned effects resulting from electromagnetic apparatus and which it is the function and purpose of this invention to obviate. After an entire message has been recorded upon the tape 30 the operator restores the armature 6 to the position shown in Fig. 2, thereby stopping the spring-motor and in consequence the tapping mechanism and the tape.

It is to be understood thatin place of nonself-restoring wave-responsive devices, we may employ self-restoring wave-responsive device or devices thus dispensing with the tapping mechanism herein described.

WVhat we claim is 1. In a wireless signaling system, a waveresponsive device, and a non-inductive local circuit controlled thereby.

2. In a wireless signaling system, a waveresponsive device, and a non-inductive recording-circuit controlled thereby.

3. In a wireless signaling system, a waveresponsive device and a non-inductive circuit including the same.

4. In a wireless signaling system, a waveresponsive device, and a non-inductive recording-circuit including the same.

5. In a wireless signaling system, a waveresponsive device, and a chemical recordingcircuit controlled thereby.

6. In a Wireless signaling system, a waveresponsive device, and a chemical recordingcircuit directly controlled thereby.

7. In a wireless signaling system, a waveresponsive device, a chemical recorder, in a circuit therewith, and means responsive to the first received impulse to start the tape of said recorder.

8. In a wireless signaling system, a waveresponsive device, a non-inductive recordingcircuit controlled thereby, and means responsive to the first received impulse for starting the record-bearing means operated upon by said circuit.

9. In a wireless signaling system, a waveresponsive device, a chemical recording-circuit controlled thereby, a relay controlled by the first received impulse of electroradiant energy, and means controlled by said relay for starting the tape of said recorder.

10. In a Wireless signaling system, a waveresponsive device, a chemical recorder controlled thereby, a relay, operated at the first received impulse of electroradiant energy, and means for opening the circuit of said relay after the reception of the first impulse.

11. In a wireless signaling system, a waveresponsive device, a chemical recorder controlled thereby, a relay operated upon the first received impulse of electroradiant energy, and means controlled by said relay for starting the tape of said recorder and opening the circuit of said relay.

12. In a wireless signaling system, a Waveresponsive device, a relay operated upon the reception of the first impulse of electroradiant energy, means for starting a tapper for said Wave-responsive device and opening the circuit of said relay.

13. In a wireless signaling system, a waveresponsive device, a relay controlled thereby, and means controlled by said relay for starting an independent tapper for said wave-responsive device and for opening the circuit of said relay.

14. In a wireless signaling system, a plurality of stationary coherers arranged in parallel, a relay circuit controlled thereby, a spring-motor, means controlled by said relay to start said motor, and tapping means for said coherers operated by said motor.

15. In combination with a plurality of ooherers, a tapping device consisting of a plurality of independent spring-actuated levers, and means for successively operating said levers.

16. In combination with a plurality of coherers, a tapping device therefor comprising a rotating cam, and a plurality of independent spring-actuated tapping-levers operated successively by said cam.

17. In combination with a plurality of coherers, a tapping device comprising a shaft, a plurality of independent spring-actuated tapping-levers mounted thereon, and means for successively operating said levers.

18. In combination with a plurality of coherers, a tapping device therefor comprising a shaft, independent tapping-levers mounted thereon, resilient means exerting force upon said levers, and means for successively releasing said levers to the control of their resilient means.

19. In combination with a plurality of coherers, a tapping device therefor comprising a shaft, a plurality of independently-mounted levers upon said shaft, an arm on each lever carrying a hammer, a depending arm on each lever, a cam, and means for maintaining said depending arms in engagement with the cam.

20. In a wireless signaling system, a waveresponsive device, a relay and chemical recorder in independent circuits controlled thereby, and means for opening the circuit of the relay after the first received impulse.

21. In a wireless signaling system, a Waveresponsive device, an inductive and a non-inductive circuit controlled thereby, and means for opening the inductive circuit after the first received impulse.

22. In a Wireless signaling system, a waveresponsive device, an inductive and a non-inductive circuit controlled thereby, means in said non-inductive circuit for recording the transmitted signals, and means for opening the inductive circuit after the first received impulse.

23. In a Wireless signaling system, a waveresponsive device, a plurality of independent circuit-s controlled thereby, a source of energy common to said circuits, and means for interrupting one of said circuits after the first received impulse.

24:. In a wireless signaling system, a Waveresponsive device, an inductive and a non-inductive circuit in parallel controlled thereby,

' and means for opening the non-inductive circuit after the first received impulse.

25. In a wireless signaling system, awaveresponsive device, a non-inductive recordercircuitand a relay-circuit in parallel controlled thereby and means for opening the relay-circuit after the first received impulse.

Intestimony whereof we affix our signatures in presence of two witnesses.

HARRY SHOEMAKER. GREENLEAF W. PIOKARD. Witnesses:

M. WIEGAND, CHAs. J. FOREMAN. 

